21-7K=-3K+4

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Solution for 21-7K=-3K+4 equation:


Simplifying
21 + -7K = -3K + 4

Reorder the terms:
21 + -7K = 4 + -3K

Solving
21 + -7K = 4 + -3K

Solving for variable 'K'.

Move all terms containing K to the left, all other terms to the right.

Add '3K' to each side of the equation.
21 + -7K + 3K = 4 + -3K + 3K

Combine like terms: -7K + 3K = -4K
21 + -4K = 4 + -3K + 3K

Combine like terms: -3K + 3K = 0
21 + -4K = 4 + 0
21 + -4K = 4

Add '-21' to each side of the equation.
21 + -21 + -4K = 4 + -21

Combine like terms: 21 + -21 = 0
0 + -4K = 4 + -21
-4K = 4 + -21

Combine like terms: 4 + -21 = -17
-4K = -17

Divide each side by '-4'.
K = 4.25

Simplifying
K = 4.25

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